JPH04333653A - Tufting technique and device for executing said technique - Google Patents

Abstract

PURPOSE: To provide a tufting process capable of constituting many tufting designs with a single device and the device for implementing this process. CONSTITUTION: This process consists of a process of letting off a cloth at a variable speed between each stitch and moving hooks 6 in synchronism with needles 4. The device for implementing this process comprises a frame 3 bearing the needles 4, a frame 10 bearing the hooks 6, a means for letting off the woven fabric, a means for stitching the needles bearing yarns through the cloth and a means for capturing the yarns past the cloth. Further, the device includes a means for letting off the cloth at a variable speed and a means for moving the hook frame in synchronism with the needle frame.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to tufting (tuf).
ting) construction method and equipment for carrying out this construction method.

0002

BACKGROUND OF THE INVENTION The tufting technique, which is used in particular for the production of floor carpets, comprises a cross needle which pierces the woven fabric in a straight line, the cross needle carrying a thread, which is held by a pivoting vertical needle during each piercing, and said vertical needles and horizontal needles are arranged on opposite sides of the fabric. The feeding of the fabric takes place continuously and regularly.

[0003] In the known device, the horizontal needle and the vertical needle are
They are arranged successively in modules forming a horizontal needle frame and a vertical needle frame, respectively. In order to make the design configurable, the transverse needle frame moves along the longitudinal axis with respect to the direction of fabric travel (transverse direction), however the vertical needle frame is fixed.

The movement of the horizontal needle frame is limited because for each piercing, each horizontal needle must have an opposing vertical needle. The movement of the horizontal needle frame is determined by the distance between two consecutive horizontal needles [in tufting technology, the gauge (
gauge) and must correspond to one or more gauges.

[0005]

[Problem to be Solved by the Invention] This means that the only piercings possible with respect to one horizontal needle frame are (a) linear piercing when the horizontal needle does not operate, and (b) linear piercing when one horizontal needle is (c) double zigzag piercing when the device comprises a second cross needle frame parallel to the first cross needle frame;
d) means only linear piercing when the cloth moves back and forth.

Another possibility is to change the pitch of the gauges, but changing one gauge to another requires changes and adjustments to the horizontal needle frame and the vertical needle frame. Additionally, changing gauges requires adjustments to control strings, cams, hydraulic systems, etc. Not only do these adjustments require time and labor, but the tufting loom is generally not in operation unless the machine is producing the gauge and tuft height to which it is set.

An object of the present invention is to provide a tufting method and an apparatus for implementing this method, which can overcome the above-mentioned drawbacks.

Another object of the invention is to provide a tufting method that allows the construction of a large number of designs and an apparatus for carrying out this method.

Still another object of the present invention is to provide a tufting method in which the cross needle can be operated independently of the gauge.

0010

[Means for solving the problem] First construction method according to the present invention
According to the feature, the vertical needles operate synchronously with the horizontal needles, and each horizontal needle forms a pair with its vertical needle. The synchronized movement of the horizontal needle with the vertical needle allows various movements independent of the gauge. Furthermore, each pair (horizontal needle-vertical needle) can be permanently adjusted and set before the device is activated.

According to another feature of the invention, the fabric is fed out at different speeds to allow for variations in design. The feeding of the fabric is preferably stopped during piercing. Also, the feeding of the fabric is stopped in advance during a specific movement of the pairs (horizontal needles - vertical needles), so that all piercings in the same longitudinal plane (with respect to the transverse direction of progress of the fabric) are carried out by the same pair. enable you to be

The fact that each horizontal needle is always located opposite the same vertical needle in all its positions allows large longitudinal deviations without being restricted to the horizontal needles, and this , in conjunction with the stopping or feeding of the fabric, offers great possibilities for color and design changes. This technique makes it possible to "break" the effects of repeated alignment of carpet loops in the weft direction.

[0013] A large number of piercing possibilities are possible, including moving the transverse needle and its respective vertical needle in different steps to the right or to the left.

This advantage also makes it possible to change a large number of horizontal and vertical needles, allowing more designs to be made with fewer pairs (
This is possible with horizontal needle - vertical needle). The spacing of the cross needles can be selected depending on the size of the design, the required production and the rotation of the various properties to be tufted.

Different designs can be programmed with different gauges and densities for the same type of cross needle selected. Color changes can be made using creel.

According to another feature of the invention, cross needles can be used which have cross needle holes in the flat part, called the blade, and which cross needles have a longitudinal axis (of each cross needle). ) is mounted in a rotating module and configured such that the blade forms an angle in a plane oriented perpendicular to the direction of fabric delivery.

[0017] Said angle is preferably between 15° and 45°.
The range is set to . Additionally, the vertical needles are also mounted within the module and configured such that the swinging motion of each vertical needle forms the same angle as that of its paired horizontal needle.

This feature removes the thread from the tip of the cross needle and prevents it from being inserted.

According to yet another feature of the invention, the fabric is fed out in a vertical plane during piercing, and the cross needle frame and the vertical needle frame are located in a horizontal plane on opposite sides of the fabric.

[0020] As a result of the longitudinal arrangement of the cross needles without being restricted by gauge, a support comb of fabric is no longer used, however said use is unnecessary. This is because, according to another feature of the invention, smooth supports and continuous tensioning means are used, allowing control of penetration without the use of prescheduled gauge combs and similar means.

[0021]

EXAMPLES Next, the present invention will be described in detail below with reference to the attached documents showing examples thereof.

FIG. 1 is a schematic diagram of a prior art piercing system, showing a woven fabric (a) being fed out from a roll (b), said roll being in a horizontal plane (arrow c) below a frame (d). ), and the axis of the frame is located within the cloth (a
) is perpendicular to the sending direction. Said frame (d)
holds a cross needle (e) following a fixed gauge (f). Said frame (d) can perform a back and forth motion (arrow g) and allows a zigzag pattern (h). Yarn (i) is supplied from a set of bobbins (not shown). The vertical needles are fixed-mounted on the vertical needle frame and positioned below the fabric, but are not visible on the screen. The thin woven fabric is sent out regularly, and the horizontal needles (a) are fixed because the vertical needles are fixed.
In order to operate only within the steps of the gauge (f), and because the horizontal needle (e) must always be opposite the vertical needle, the design will not move on the line segment if the frame (d) does not operate. or zigzag (h) if the horizontal needle frame (d) moves back and forth (g) within the gauge step (f).

FIG. 2 is a diagram of the same type as FIG. 1, but according to the technique of the present invention. The fabric 1 is fed into a vertical plane (arrow 13) between the frame 3 holding the cross needles 4 and the frame 10 holding the vertical needles 6 (FIG. 3). The horizontal needle 4 carrying the thread 11 is arranged in a module 8 on the frame 3, and likewise the vertical needle 6 is arranged in a module 9 on the frame 10.

According to a feature of the invention, the fabric 1 moves in a variable manner, so that the spacing 15 between two adjacent piercings in another horizontal plane also corresponds to a change in the movement of the fabric. Can be changed.

According to the invention, since the vertical needle 6 operates synchronously with the horizontal needle 4, there is no reason to provide a uniform gauge. Therefore, the spacing 14 between two adjacent piercings in the same plane can be varied as well. Arrows 5 and 7 indicate the piercing direction and horizontal movement direction of the horizontal needle 4, respectively. It can be seen from FIG. 2 that the design 2 is compoundable and can be varied almost without limit.

In the embodiment shown in FIG. 3, the same components as in FIG. 2 are given the same reference numerals. In this figure, the particular arrangement of the horizontal needles 4 and the vertical needles 6 is shown. The horizontal needle 4 has a flat part 21, called a blade, which is provided with an eye 22 through which the thread 11 is inserted. The longitudinal axis of each cross needle is rotated such that the blade 21 forms an angle 24 (in the direction of cloth travel 13) with a vertical plane 23, and in this example said angle is set at 30°. ing. The parts of the warp needles 6 which hold the thread 11 are formed at the same angle 24 or 30° to the vertical plane 23, which is indicated by the plane 25 in FIG. This plane 25 also shows the angle of intersection of the horizontal and vertical needles. Arrow 26 indicates the movement of vertical needle 6. The spacing 12 between two adjacent vertical needles (and two adjacent horizontal needles) can have multiple gauges without being fixed. Element 27 forms the support structure of the thin fabric, and this element
Together with the tensioning roller 28 and the fabric pressing element 29 (FIG. 4) they constitute a device that keeps the fabric 1 under tension at all times.

FIG. 4 shows an example of feeding out the woven fabric 1. The fabric is fed from a storage roller and is fed by a step motor 32
It passes through a delivery cylinder 31 which is driven by a motor and is equipped with an electromechanical locking system 33 for feeding and stopping the fabric. This system 32-33
This allows the fabric to be stopped during piercing and allows the delivery to be controlled in various steps. The fabric 1 is tensioned at the piercing section by a tensioning cylinder 28 driven by a continuous tensioning motor 34 with an electromagnetic clutch 35 controlling the tension. In the piercing section, the fabric passes through the support element 27 and the fabric pressing element 29.

[0028] Conventional digital electronics controlling the machine are used for overall control of the loom. This device allows the frame to be placed longitudinally and
By controlling the feed speed of the cloth, the piercing speed can be increased to, for example, 6 per minute.
00-700 piercing speeds must be possible. The device also controls the automatic setting of various tufting parameters: cross needle stroke, loop height, yarn delivery, yarn tension and fabric tension. This conventional electronic device is known to those skilled in the art and its implementation therefore does not fall within the scope of the present invention.

FIG. 4 shows an embodiment of the longitudinal guide of the horizontal needle frame and the vertical needle frame, respectively, with reference numeral 38.
and 39, which will be described in detail later.

[0030] By configuring the different elements, and in particular for the vertical delivery of the fabric, it is possible to accommodate the bobbin of thread 11 in the base of the machine, which makes it possible to accommodate the fabric in the horizontal delivery. In some cases it is not possible. Therefore,
Important elements such as the cross and vertical needles are more easily accessible and the machine is also easier to control.

FIGS. 5 and 6 are an embodiment for explaining the positioning and operation of the horizontal and vertical needles, and show a step drive motor 51 that rotates a worm 52 that holds a nut 53. and the nut pivots-
It is linked to a yoke 55 by a pin rod 54, and said yoke is further linked to the frame 3 holding the cross needle 4 by means of a guide connection member 56 and to the frame 10 holding the vertical needle 6 by means of a guide connection member 57. are combined. The movement guide of the cross needle 4 is schematically indicated by a broken line 58, while the reference numeral 59 indicates the woven fabric 1.
shows the plane of

FIG. 6 schematically shows the movement 69 of the vertical needle 6. This movement is controlled by twin cams 61 which are arranged to rotate (arrow 62) and rock (arrow 63) the rocker 65 by means of rollers 64 against its smooth contour. . This movement 70 is transmitted by the connecting rod 66 to the intermediate rockers 67 (two of which are shown), and the movement 71 is transmitted to the vertical needles 67.
The guide section 68 of the operation 69 is defined. Vertical needle frame 10
The longitudinal guide of the cross needle frame 3 is designated by the reference numeral 39, and the longitudinal guide of the cross needle frame 3 is designated by the reference numeral 38 in FIG. The device is capable of positioning frames 3 and 10 with an accuracy of less than 0.1 mm.

It is clear that the invention is in no way limited to the embodiments described in the examples and drawings. For example, using known mechanisms to achieve synchronous operation between the horizontal needle module and the vertical needle module
Since said operation can be achieved in various ways,
Easy for peers. There are also many ways to control and adjust the irregular delivery of the fabric. The combination of variable feed-off of the fabric and movement of cross-needle and warp-needle frames likewise belongs to the field of ordinary mechanical and electronic technology.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram illustrating a tufting construction method in the prior art.

FIG. 2 is a schematic diagram illustrating the tufting method according to the present invention.

FIG. 3 is a perspective view of the apparatus showing a tufting area, which is an embodiment of the apparatus for carrying out the tufting method according to the present invention.

4 is a schematic vertical sectional view of the device shown in FIG. 3; FIG.

FIG. 5 is a plan view of an embodiment of a device for synchronously positioning horizontal and vertical needle frames;

FIG. 6 is a partial side view of the device shown in FIG. 5, and is an explanatory diagram showing the operation of the vertical needle;

[Explanation of symbols]

1 Woven fabric
2 Design 3 Frame
4 Horizontal needle 5 Piercing direction (arrow)
6 Vertical needle 7 Horizontal movement direction (arrow)
8, 9 module 10 frame
11 Thread 12, 14, 15 Spacing
13 Vertical plane, direction of travel (arrow) 21 Blade (flat part) 2
2 holes 23 vertical plane
24 Angle 25 Plane
2
6 Vertical needle movement (arrow) 27 Fabric support element
28 Tension roller 29 Cloth pressing element
31 Feeding cylinder 32 Step motor
33 Electromechanical locking system 34 Continuous tension motor
35 Electromagnetic clutches 38, 39 Longitudinal guide section 5
1 Step drive motor 52 Worm
53 Nut 54 Swivel pin rod
55 Yoke 56, 5
7 Guide connection member 58
Movement guide part of horizontal needle (broken line) 59 Woven fabric plane
61 Twin cam 62 Rotation direction (arrow)
63 Swing direction (arrow) 64 Roller
65 Rocker 66 Connecting rod
67 Intermediate rocker 68 Guide section
69 Movement of vertical needle 70, 71 Movement

Claims (7)

[Claims] Claim 1: Consisting of a series of horizontal needles, each horizontal needle comprising:
Each holds a thread and is continuously spaced apart from each other by a predetermined distance, and pierces the woven fabric as it is fed out from the delivery cylinder, and has longitudinal threads placed on the other side of the fabric. In a tufting method in which the needles are arranged to move synchronously with the horizontal needles to capture the thread from each horizontal needle, several piercing operations are performed at successive horizontal positions, and the horizontal needles and vertical needles A tufting method characterized in that the tufting operation is performed in synchronization with at least one of both lateral positions, and the feeding operation of the woven fabric is stopped during the lateral movement of the horizontal needles and the vertical needles. 2. The tufting method according to claim 1, wherein the horizontal piercing positions of the horizontal needles and vertical needles are not limited by the distance between two consecutive horizontal needles or vertical needles. 3. The tufting method according to claim 1, wherein the transverse piercing positions of the horizontal needles and the vertical needles are not limited by the so-called gauge restriction of the tooth comb of the woven fabric. [Claim 4] Frame (3) supporting the horizontal needle (4)
, a frame (10) supporting the vertical needles (6), and a woven fabric (
1) between the horizontal needle frame (3) and the vertical needle frame (10); and means (58) for passing the horizontal needle holding the thread (11) through the fabric (1). and means (61-67) for rotating the warp needles to catch the thread (11) passing through the fabric (1), and for feeding the fabric in a stepwise manner at a stepwise changeable speed or Tufting device characterized in that it consists of means (32-33) for maintaining in a fixed (stopped) position during successive lateral piercing operations. 5. The fabric according to claim 4, further comprising means (34-35) for maintaining the fabric under continuous tension during the fixed (stop) position.
Tufting equipment as described. 6. Each cross needle (4) has a blade (21) with an eye hole (22), furthermore each cross needle (4) rotates about its longitudinal axis in the frame (3). and then installed.
The blade is aligned with the vertical plane (23) in the direction of cloth travel.
Tufting device according to claim 4, characterized in that it forms an angle (24) of between 5° and 45°. 7. The vertical needles (6) are arranged in such a way that the linear movement of each vertical needle (6) forms the same angle (24) as the angle of the horizontal needle (4) cooperating with this vertical needle. Tufting device according to claim 6, characterized in that it is mounted on a frame (10).